Unit 1 Tales of unexplained 同步练习(四)
Grammar and usage (1)
I.将括号中的动词用现在完成时或现在完成进行时填空：
（有些动词可以用两种形式）
1. I __________ (write) an essay since two o’clock.
2. —— You look exhausted!
—— Yes, I ________ (play) tennis and I ________ (not play) for years, so I’m not used to it.
3. This is the third time you _________ (be) here. What exactly you ______ (come) for now?
4. I __________(travel) a lot in America. (= I know America.)
5. I ___________(read) your book. (= I haven’t finished it.)
6. I ___________(read) your book. (= I’ve finished it.)
7. I __________ (work) all day (and I’m tired out).
8. He __________ (lose) money for years (and will probably continue to lose money).
9. I __________ (know) Miss Huggins for several years. I ___________(read) her latest novel, but I _____ (not finish) it yet.
10. John ________ (learn) for several years, and at last he _______ (master) the irregular verbs.
